Furnace.



J. P. mu..

FURNACE.

(Application led Dec. 5, 1900.

Patented Feb. I9, |901.

No Model.)

ATTE-I:

INNEN TUE'.

1 /MMW A TTY arent JOHN P. GILL, OF CLEVELAND, OHIO.

VFURNACE.

SPECIFECATION forming part of Letters Patent No. 668,309, dated February19, 1901.

` Application led December 5, 1900. Serial No. 38,7%. (No model.)

To 1r/ZZ whom, t may concern:

Be known that I, JOHN P. GILL, a citizen of the United States, residingat Cleveland, in the county of Cuyahoga and State of Ohio, have inventedcertain new and useful Improvements in Furnaces; and I do declare thatthe following is a full, clear, and exact description of the invention,which will enable others skilled in the art to which it appertains tomake and use the same.

My invention relates to improvements in furnaces, and although thefurnace is shown in this instance as associated with a boiler and is sodescribed and claimed it should be understood that as a furnace simplyit is applicable to other` purposes as Well wherein boilers are notused, such as annealingovens and ovens and uses of different kinds.However, as here shown, there is a boiler in the combination, and theheat from the furnace and fresh air for supplying combustion are passedalternately through the same channels to and from the fu rn ace,iirstpassing the heat, and thus heating the channel, and then passing the airthrough the same channel and heating the air before it reaches thefurnace. This alternation involves both sides of the furnace, becausewhile the heat is going out at one side air is coming in at the other.

In the accompanying drawings,Figure lis a longitudinal sectionalelevation of my improved furnace and boiler construction. Fig. 2 is planview on line A A, Fig. l. Fig. 3 is a cross-section on line B B, Fig. 1.

It will thus be seen that the entire plan of the furnace and the boileralso, as shown here, is double and reciprocal, the boiler 'beingconstructed especially to adapt it to use with a furnace of this kind,the object of course being to obtain as nearly perfect com bustion as ispracticable and consequent economy of fuel and a smokeless re.

A represents the furnace. This may be of the very simple form hereshown, or it may be of a very different form and construction, as may bebest adapt-ed to any given case, and there may be any suitableattachment connected therewith for feeding or supplying coalautomatically or otherwise. Being located centrally across beneath theboiler B,the heat flows therefrom toward one end vor the other of theboiler over side walls, according as one channel or the other for thetimeis opened for this purpose. These channels lead from the furnace bya circuitous route to the smokestack S, and in Fig. l the products ofcombustion are shown as passing to the left from the furnace and air isapproaching the furnace from the right, taking the course of the arrowsin both cases. Thus at the left the products of combustion first descendthrough brick checkerwork C into the open space at the bottom thereof,and thence beneath dividing-wall 2 into checker-work D, while at theright air is reaching the furnace first through checker-work D' and thendipping beneath wall 3, rising through checkerwork C', and entering thefurnace over the fire, where gases and smoke arise and where theessential work of combustion occurs. Of course there may be more or lessair admitted from beneath through grate-bars 4, according to conditionswhich a capable fireman will understand and control.

The space on the ends of the boiler and furnace is further compartmentedor divided up by walls 5 and 6, a full cross-section of one of which isshown in Fig. The upright portions of these walls come centrally of theends of boiler B, while the lower horizontal portion lies halfway acrossthe width of the boiler-space on a line just beneath the same and theupper horizontal portion lies well up toward the top of the boiler. Thisthrows the full width of the boiler-space open to the checker-work D upto bottom of the boiler and half said width from there to the top ofWall 6 and leaves the other half (indicated by S and 9) at therespective ends open as flueway for the escape of products of combustionpassing through the boiler. The iii ght of arrows a shows the directionof travel from the furnace and the flight of arrows b shows thedirection taken by the fresh air for the furnace. In Fig. 2 the productsof combustion issuing through checker-work D goes through the boiler,heating the same, and discharges into the open flue-space 9. When thedirection of travel of the heat and air is changed or reversed, thetravel of the heat will issue into the boiler through checker-Work D andemerge into chamber 8 and go thence IOO ' tion of travel of fresh airwill be reversed also and air will now enter through checkerworkchambers D and C to the furnace, traveling in the reverse direction toarrows a. The

air approaches these chambers through downflues or passages GandH,discharging beneath horizontal walls 5 and 6 into checker-workchambers D and D/, respectively. Suitable valves l0 and l2 close liues Gand H, and any vsuitable kind of valve 14 may be used to close the twopassages 15 and 16,'leading from the opposite ends of the boiler tostack S. As shown here, these three several valves are operativelyconnected by a chain or cord 18, so that all said valves can be movedtogether and instantly reverse the direction of travel of heat and air.This is done as often as may be required to work out my principle ofoperation, which is to heat one set of checkerwork bricks by theoutiiowing heat so hot that they will practically superheat theiniiowing air by the time it reaches the furnace, and thus prepare it tochemically combine at once with the gases arising from the coal, andthus effect perfect combustion and the consequent intense heat whichsuch a lire produces. When the bricks on that side get so much cooledthat the heating of the air becomes insufficient, the valves arereversed and the heat and air exchange circuits, andl so on alternately.

l either passage Gr or H cannot run to the boiler The air enteringthrough directly and must first pass through the furnace,because theopposite outlet-passage from the boiler is closed, as in Fig. l. Hencethe air coming in through iiue H may fill checkerwork chambers D', butcan only nd exit by draft from the furnace by a dip beneathdividing-walls 3, whence it runs to the furnace by checker-work C.

If an oven or the like were used instead of the boiler, the samearrangement substantially would be observed, as here shown, the oventaking the place of the boiler and the heat passing through the ovenfrom opposite directions alternately and the air for the furnace beingheated in thesame way.

Obviously two or more boilers could be used instead of one only andserve in the same way. If there were two, chamber D might discharge intoone boiler and chamber D into the other, said boilers corresponding tothe present subdivision of the single boiler shown.

What I claim is- 1. In furnaces for boilers and other uses, a furnaceand a set of inner and outer checkerwork chambers at each side thereofand a wall between said chambers having a passage at its bottom from onechamber to the other,

y an air-inlet flue to each outer chamber and a separate heat-outletalso from each `outer chamber, and Walls separating said air-inlets andheat-outlets, substantially as described.

2. A furnace and a set of walls in checkerwork chambers at -each side,said chambers and their walls constructed to pass the heat from thefurnace down through one chamber and up through the other at each sideof the furnace, and a separate passage-way for the heat from each outerchamber to the stack, substantially as described.

3. The furnace and the two checker-work chambers at its side and a wallseparating said cham bers having a passage at its bottom from one to theother, a separate air-inlet Hue to each outer chamber, and separatevalves controlling the said iiues, substantially as described.

4. A furnace and a set of inner and outer checker-work chambers at eachside thereof, one of said sets constructed to pass air rst down throughone chamber and then up through the other, and theI other setconstructed to pass heat down through one chamber and up through theother, and a dischargepassage from the heat-outlet chambers to thestack, substantially as described.

5. The furnace and the inner and outer checker-work chambers at eachside thereof connected in pairs by an open passage at their bottom, aboiler having a portion of each end open to a portion of the outer ofsaid chainbers at said ends, and a wall dividing off the other portionof the ends of the boiler, substantially as described.

6. The furnace and the inner and outer checker-work chambers in sets atits sides, the boiler resting across said furnace and the inner of saidchambers at the sides of the furnace, the other of said chambers eachoverlapping a portion of one end of the boiler and a wall closing outthe portion of the boiler not so covered by said chambers, and means tocause the heat to travel first through one set of chambers and thecorresponding portion of the boiler and then through the other set ofchambers and the other portion of the boiler, substantially asdescribed.

7. The furnace and a set of checker-work chambers at each of its sides,the boiler resting across said fu rnace and the inner of said chambersand having the outer chambers each in open relation to a portion of oneend, a fresh-air iiue to each outer checker-work chamber, a separatevalved outlet-passage

